Energy levelsThe atom contains protons, neutrons, and electrons.
Proton= positive charge
Neutron= neutral charge
Electron= negative charge
It was first proposed by early Indian and Greek philosophers.
ElectronsDiscovered by J.J Thomson.
Electrons are negatively charged subatomic particles .
It was discovered by experimenting with Cathode Rays.
The mass of an electron is 9.11 x 10 to the negative 31st power.
The NucleusThe Nucleus
The Nucleus was discovered by Ernest Rutherford.
As the Gold Foil experiment was being performed, he disovered it.
The ProtonThe proton, electron, and neutron
The Proton of an atom was discovered by Ernest Rutherford in 1918.
The proton has a positive charge,
the mass the the proton was 1.6 x 10 to the negative 27th power.
The proton was discovered in the nucleus
The NeutronThe Neutron was discovered by James Chawick in 1932.
it has a neutral charge to it, and the mass is slighty larger then the protons.
It was discovered when James performed a series of experiments. He suggested that the new radiation consisted of uncharged particles of the mass of a proton, he called them neutrons